Hi. From the description provided it looks like you present to doctors with symptoms that indicate a heart condition, which might direct the doctors to investigate your cardiac profile and find nothing abnormal. But what you need to know is that many conditions mimic the presentation of heart conditions like a heart attack. They include gastrointestinal conditions like peptic ulcer disease, irritable bowel syndrome, inflammatory bowel disease, etc; or even conditions related to the bones and joints of the chest like Tietze s disease or costochondritis. If your cardiac profile has found to be normal, then I would suggest looking into conditions that can cause such a presentation, like the above listed ones. Hope this helps. Take care.